WO2017084210A1 - 内支撑绳锯无损切割拆除结构及其施工工法 - Google Patents

内支撑绳锯无损切割拆除结构及其施工工法 Download PDF

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WO2017084210A1
WO2017084210A1 PCT/CN2016/072282 CN2016072282W WO2017084210A1 WO 2017084210 A1 WO2017084210 A1 WO 2017084210A1 CN 2016072282 W CN2016072282 W CN 2016072282W WO 2017084210 A1 WO2017084210 A1 WO 2017084210A1
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cutting
wire saw
horizontal
inner support
rod
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PCT/CN2016/072282
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English (en)
French (fr)
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苏文藏
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苏文藏
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/08Wrecking of buildings

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  • the invention relates to the technical field of building construction, in particular to a non-destructive cutting and dismantling structure of an inner support wire saw and a construction method thereof.
  • Super high-rise buildings are often built in the center of the city, close to adjacent buildings and communities, and even close to subway stations and surrounding commercial streets.
  • the crowds are dense, the traffic is heavy, and the underground pipelines are complex. To save space, it is often designed deeper.
  • the basement leads to a large depth of excavation and a lot of safety hazards.
  • an internal support system is usually added on the foundation of the retaining pile or the continuous wall.
  • the demolition of the inner support in the prior art is usually carried out by demolition with the explosion method, the static explosion method, the splitting method, etc., and the utility model has the advantages of low work efficiency, high noise, dust and the like;
  • the prior art demolition method is labor intensive and low in work efficiency, and has a high work risk and low reliability, which is not conducive to popularization and application.
  • the structure is complicated to install and is not restricted by the surrounding site, and cannot be firmly installed, which makes the operation of the entire structure difficult during the dismantling process.
  • the present invention provides a non-destructive cutting and dismantling structure of an inner support wire saw and a construction method thereof.
  • An inner support wire saw non-destructive cutting and dismantling structure comprising: an operation platform, an inner support frame and a wire saw machine, wherein the operation platform is disposed on the poured concrete structure, A structural formwork support frame is disposed under the poured concrete structure, the wire saw machine is disposed on the beam top of the inner support frame, and the operation platform comprises a longitudinal sweeping rod, a vertical pole, a horizontal sweeping rod, a longitudinal horizontal pole, and a horizontal horizontal pole. And a guard rail, the pole being cross-connected with the longitudinal sweeping rod and the lateral sweeping rod, the pole being further cross-connected with the longitudinal horizontal rod and the horizontal horizontal rod.
  • the operating platform further includes a scissor support, the scissors are supported on two sides of the protective railing frame body, and are fixed on the bottom layer of the horizontal sweeping rod, the longitudinal sweeping rod and the uppermost horizontal horizontal rod, Horizontal horizontal on the pole.
  • the width of the scissor support of each track is 4-6 m, and the inclination angle with the ground is 45-60.
  • the longitudinal horizontal rods have a pitch of 1 m and a step distance of 1.5 m.
  • the horizontal horizontal rod spacing is 1 m, and the step distance is 1.5 m.
  • the equipment base of the wire saw machine is fixed in the bore of the concrete beam on the inner support frame via an expansion screw, and the direction of the diamond rope mouth on the wire saw machine and the rotary cutting drive wheel, the guide wheel, and the cutting The rope and the cutting surface are on one plane.
  • a wire sawing console is arranged behind the wire sawing machine.
  • the wire saw operating table is 5-10 m away from the wire saw machine.
  • the inner support frame comprises a main beam, a secondary beam and a steel pipe column, and the main beam and the secondary beam are respectively cross-connected with the steel pipe column.
  • a construction method for a non-destructive cutting and dismantling structure of the inner support wire saw characterized in that the method comprises the following steps:
  • Construction preparation 380V, 220V AC power supply and sufficient water source are laid The construction site is connected with the host, and the pit control line and deformation observation point are determined and properly protected after setting;
  • Determining the cutting section Calculate the size and weight of the cutting block according to the lifting capacity of the lifting equipment and the section of the concrete structure of the inner supporting beam, determine the position of each cutting section, and draw a layout drawing of the cutting section.
  • the construction personnel design according to the cutting section The layout is performed on the site, and the inner support beam structure is scribed to determine the cutting position;
  • the erection sequence is a longitudinal sweeping rod-upright-lateral sweeping rod-longitudinal horizontal rod-horizontal horizontal rod-protective railing.
  • the scissors are supported on the two sides of the protective railing frame body, and are fixed on the bottom layer of the lateral sweeping floor.
  • the rod, the longitudinal sweeping rod and the upper horizontal vertical horizontal rod and the horizontal horizontal rod are fixed on the bottom layer of the lateral sweeping floor.
  • the width of the scissor support of each track is 4-6 m, and the inclination angle with the ground is 45-60.
  • step (4) drilling the concrete beam of the inner support beam, and using the expansion bolt to close the base of the sawing machine, adjusting the angle of the wire saw to make the direction of the diamond rope and the rotating cutting drive wheel
  • the guide wheel, the cutting rope and the cutting surface are on one plane.
  • the wire saw table is placed 5 to 10 m behind the side of the wire saw machine.
  • the inner support beam cutting should follow the order of first removing the secondary beam, then removing the main beam, and finally removing the steel pipe column.
  • the vertical cutting or the horizontal cutting method is used for the construction.
  • the cooling water addition point of the horizontal orifice moves with the saw seam; when cutting vertically, the cooling water nozzle must move as the wire saw cutting position changes.
  • the supporting wedges are added to the slats that have been cut in time to prevent the concrete blocks from falling and crushing the beaded ropes to cause damage to the bead ropes; in the horizontal cutting process, in the vertical kerfs as needed A wedge is inserted to support the separator.
  • the cutting process is adjusted through the operation console. Cutting parameters, keeping the running speed of the diamond rope at around 20m/s.
  • step (6) if the concrete block exceeds the working height of the forklift, the concrete block is transferred to the forklift by the electric hoist.
  • step (6) in the process of transporting the concrete by the forklift or installing the temporary construction equipment, 10 mm thick steel plate protection is placed in the range of the forklift driving above the poured concrete structure.
  • the invention has the advantages of non-destructive static cutting, small disturbance to the structure, low noise, no dust, no pollution; high cutting speed and high efficiency, for example, cutting a cross-sectional area of 1 m 2 ,
  • the volume is 1m 3 concrete structure. It takes only 20 minutes to cut with a wire saw, and the work efficiency is greatly improved.
  • the overall equipment of the invention is simple and easy to install, and is not limited by the space and space, and the cut section is flat.
  • the size and direction of the cutting block can be determined according to the lifting weight of the lifting equipment and the site conditions; each device is equipped with 2 people, the manual air compressor is reduced, the wind is cut, the degree of mechanization is high, and the waste of labor is reduced.
  • Figure 1 is a cross-sectional view showing the removed structure of the present invention
  • FIG. 2 is a schematic plan view showing the inner support beam of the present invention.
  • Figure 3 is a schematic view showing the distribution of the cutting line of the present invention.
  • Figure 4 is a schematic view of a vertical cutting line of the present invention.
  • Figure 5 is a schematic view of a transverse cutting line of the present invention.
  • Figure 6 is a schematic view showing the installation position of the wire saw machine of the present invention.
  • Fig. 7 is a schematic view showing the distribution structure of the scissors support of the present invention.
  • inner support frame 11, main beam; 12, secondary beam; 13, steel pipe column; 20, poured concrete structure; 30, structural formwork support frame; 40, operating platform; 41, longitudinal sweeping rod; 42. Horizontal sweeping rod; 43, pole; 44, vertical horizontal rod; 45, horizontal horizontal rod; 50, wire saw machine; 61, vertical cutting line; 62, horizontal cutting line; 70, scissors support.
  • an inner support wire saw non-destructive cutting and dismounting structure includes an operation platform 40, an inner support frame 10, and a wire saw machine 50.
  • the inner support frame 10 includes a main beam 11, a secondary beam 12, and a steel pipe column 13.
  • the main beam 11 and the secondary beam 12 are respectively cross-connected with the steel pipe column 13.
  • the operation platform 40 is disposed on the poured concrete structure 20, and the structural formwork support frame 30 is disposed under the poured concrete structure 20, the wire saw machine 50 is disposed on the beam top of the inner support frame 10, and the operation platform 40 includes a longitudinal sweeping rod 41, a rod 43, a lateral sweeping rod 42, a longitudinal horizontal rod 44, a horizontal horizontal rod 45, and a guard rail (not shown), the pole 43 is cross-connected with the longitudinal sweeping rod 41 and the lateral sweeping rod 42, and the upright 43 is also associated with a longitudinal horizontal rod 44 is cross-connected with the horizontal horizontal bar 45.
  • the longitudinal horizontal rods 44 have a pitch of 1 m and a step distance of 1.5 m
  • the horizontal horizontal rods 45 have a pitch of 1 m and a step distance of 1.5 m.
  • a scissors support 70 is required.
  • the scissors support 70 is disposed on both sides of the protective railing frame body, and is fixed on the lowermost horizontal sweeping rod 42, the longitudinal sweeping rod 41, and the uppermost horizontal horizontal rod 44 and the horizontal horizontal rod 45, each of the scissors
  • the struts 70 have a width of 4-6 m and an inclination angle of 45 to 60 with the ground.
  • the equipment base of the wire saw machine 50 is fixed to the inner support frame 10 by an expansion screw.
  • the bore of the concrete beam and the direction of the diamond rope on the wire saw 50 and the rotary cutting drive wheel, the guide wheel, the cutting line, and the cutting face are in one plane.
  • a wire saw table is provided behind the wire saw machine 50, and the wire saw table is 5-10 m from the wire saw machine 50.
  • the present invention also provides a construction method for a non-destructive cutting and dismantling structure of an inner support wire saw, comprising the following steps:
  • the operation platform 40 is placed on the bottom of the concrete beam.
  • the operation platform 40 is placed above the poured concrete structure 20, and the poured concrete structure 30 is disposed on the structural formwork support frame 30.
  • the longitudinal sweeping bar 41 and the longitudinal horizontal bar 44 follow the direction of the inner support beam 10, and the lateral sweeping bar 42 and the longitudinal horizontal bar 45 are perpendicular to the inner support beam 10.
  • the scissors support 70 is arranged on both sides of the protective railing frame body, and is fixed on the lowermost horizontal sweeping rod 42 and longitudinal direction.
  • the sweeping rod 41 and the upper horizontal horizontal horizontal rod 44 and the horizontal horizontal horizontal rod 45 each have a width of 4-6 m and an inclination angle of 45 to 60 with the ground.
  • the removal of the inner support shall follow the sequence of first removing the secondary beam 12, then removing the main beam 11, and finally removing the steel tubular column 13.
  • the construction personnel shall perform on-site stakeout according to the layout drawing of the cutting section, and scribe the inner support structure to determine the cutting position.
  • the console 40 is placed, and the wire saw table 40 is placed at a suitable position for observation and manipulation from 5 to 10 m behind the wire saw 50 side.
  • support wedges should be added to the saw joints that have been cut to prevent the concrete blocks from falling and crushing the beaded ropes, causing damage to the bead ropes. It is also possible to insert a wedge in the vertical kerf to support the separation body.
  • the cut concrete block is laid flat on the first erected support platform.
  • the concrete block can be horizontally displaced by the forklift to the tower crane or crane lifting range or directly lifted by the tower crane or crane to the flatbed truck for transportation.
  • the working principle of the invention is that the hydraulic diamond wire saw cutting device is composed of an electric motor, a transmission positioning pulley and a diamond rope.
  • the diamond rope is rotated at a high speed around the cutting surface by the motor, and is cooled by water and taken away by the powder.
  • the cut body is statically separated in a smooth condition.
  • Shuibei Jewelry Headquarters Building Project has a total land area of 21428.82m2, a total construction area of 246532.77m2, and a floor area ratio of 7.6. It consists of two super high-rise buildings, commercial R&D podiums, bus stations and basements (5 floors including equipment rooms).
  • the basement is a garage, 162,860 m2 below ⁇ 0.00, a total of 4 floors, ⁇ 0.00 to 16400 m2, consisting of a 48-story complex, a 35-story (SOHO building) and a podium 5-8.
  • the project supports a total of three floors, a total of 7500m 3 of concrete; inner support beams 1200 ⁇ 1200 1200 ⁇ 1000, 1000 ⁇ 1000, 800 ⁇ 1000, 800 ⁇ 800, 600 ⁇ 600; north-south support, southwest gusset, southeast corner Supported with a plate thickness of 150mm; Steel Pipe.
  • Heaton International Plaza is located in Groups 1 and 3 of Shuangtu Village, High-tech Zone, Chengdu.
  • the commencement date is December 2009 and the completion time is July 2015.
  • the project consists of a 37-story five-star Hilton hotel, a 39-story Grade A office building, a 42-story upscale apartment-style office and a four-story basement.
  • the total construction area is 238465.78m2, including 53005.83m2 underground (including civil defense 7034m2) and 185459.95m2 above ground.
  • the building height is 168m.
  • the main function of the basement is garage, equipment room and other functional rooms; the main function of the podium is office meeting, catering, property, staff canteen, etc.; the tower is used for hotels, offices and apartments.
  • the foundation pit support design adopts the form of row pile + reinforced concrete inner support.
  • the concrete strength is C30
  • the pouring amount is about 1000m 3
  • the main component cross-section size is 800 ⁇ 800, 600 ⁇ 600
  • the column is steel lattice column.
  • the fund building project is a super high-rise commercial headquarters office building with 42 floors above ground, 4 floors underground, and 5 podiums.
  • the building area is about 109,726.59 m2, of which 81,884.35 m2 is above ground, 27,842.24 m2 is underground, and the building height is 199.8 m.
  • the internal support concrete has a large volume (total concrete of about 2700 m 3 ), high strength (support beam ⁇ strength C30), large amount of reinforcement, and large amount of lattice column (97 t).
  • the east and west sides of the foundation pit are symmetrically supported, and the seven pairs of supporting beams are symmetrically supported by the east and west.
  • the two ends of the supporting beam are provided with eight-fold support.
  • the connecting beams are connected by connecting rods and connecting beams.
  • the size of the supporting beam is 1000 ⁇ 1000, eight characters.
  • the support and contact beam size is 1000 ⁇ 800, and the connecting rod size is 800 ⁇ 600.
  • the support beam column adopts steel lattice column (4L200 ⁇ 18 combination), and the bottom part of the third support beam on the north side is supported by two ⁇ 700 steel pipe column columns.

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Abstract

一种内支撑绳锯无损切割拆除结构及其施工工法,该拆除结构包括操作平台(40)、内支撑架(10)以及绳锯机(50),内支撑架(10)包括主梁(11)、次梁(12)以及钢管立柱(13),主梁(11)和次梁(12)分别与钢管立柱(13)交叉连接。操作平台(40)设于已浇混凝土结构(20)上,已浇混凝土结构(20)下方设有结构模板支撑架(30),绳锯机(50)设于内支撑架(10)的梁顶。还提供了一种内支撑绳锯无损切割拆除的施工工法:(1)施工准备;(2)在内支撑梁底搭设操作平台;(3)确定切割断面;(4)安装固定绳锯机和操作台;(5)内支撑梁切割;(6)混凝土块吊装;(7)使用风镐对切割后的混凝土块进行破碎处理。该施工工法对结构扰动小,切割速度快,机械化程度高。

Description

内支撑绳锯无损切割拆除结构及其施工工法 技术领域
本发明涉及建筑施工技术领域,具体的说,是涉及一种内支撑绳锯无损切割拆除结构及其施工工法。
背景技术
超高层建筑常常建在城市中心区域,与相临建筑、小区较近,甚至紧邻地铁站、周边商业街道等,人流密集、交通繁忙、地下管线复杂,为节约用地空间,其往往会设计较深的地下室,导致基坑开挖深度大,安全隐患多。为保证基坑稳定和安全通常在设置挡土桩或连续墙基础上加设内支撑体系。
在地下室施工过程中,现有技术中的内支撑的拆除常用明爆法、静爆法、劈裂法等再配合风镐进行拆除,存在工效低、噪声大、粉尘多等诸多缺点;另外,现有技术的拆除方法耗费人力大、工作效率低,其工作危险度大、可靠性低,不利于推广应用。其结构安装复杂、易受到周围场地的限制而不能牢固的安装,导致整个结构在拆除过程中操作困难。
发明内容
为了克服现有的技术的不足,本发明提供一种内支撑绳锯无损切割拆除结构及其施工工法。
本发明技术方案如下所述:
一种内支撑绳锯无损切割拆除结构,其特征在于,包括操作平台、内支撑架以及绳锯机,所述操作平台设于已浇混凝土结构上,所述已 浇混凝土结构下方设有结构模板支撑架,所述绳锯机设于所述内支撑架的梁顶,所述操作平台包括纵向扫地杆、立杆、横向扫地杆、纵向水平杆、横向水平杆以及防护栏杆,所述立杆与所述纵向扫地杆和所述横向扫地杆交叉连接,所述立杆还与所述纵向水平杆和所述横向水平杆交叉连接。
进一步的,所述操作平台还包括剪刀撑,所述剪刀撑设于防护栏杆架体的两侧,且固定在最下一层的横向扫地杆、纵向扫地杆和最上一层的纵向水平杆、横向水平杆上。
更进一步的,每道的所述剪刀撑的宽度为4-6m,其与地面的倾角为45°-60°。
进一步的,所述纵向水平杆的间距为1m,其步距为1.5m。
进一步的,所述横向水平杆间距为1m,其步距为1.5m。
进一步的,所述绳锯机的设备底座经膨胀螺丝固定在所述内支撑架上混凝土梁的钻孔内,并且所述绳锯机上的金刚石绳口方向以及转动切割驱动轮、导向轮、切割绳、切割面在一个平面上。
更进一步的,所述绳锯机侧后方设有绳锯操作台。
更进一步的,所述绳锯操作台距所述绳锯机5-10m。
进一步的,所述内支撑架包括主梁、次梁以及钢管立柱,所述主梁和所述次梁分别与所述钢管立柱交叉连接。
一种上述内支撑绳锯无损切割拆除结构的施工工法,其特征在于,包括以下步骤:
(1)施工准备:将380V、220V交流电源以及充足的水源敷设到 施工现场并与主机连接好,确定基坑控制线、变形观测点并在设置后加以妥善保护;
(2)在内支撑梁底搭设操作平台:操作平台搭设于已浇混凝土结构上方,已浇混凝土结构设在结构模板支撑架上;
(3)确定切割断面:根据吊装设备的起重能力和内支撑梁混凝土结构的截面计算切割块的大小、重量,确定每道切割断面位置,绘制切割断面设计排版图,施工人员根据切割断面设计排版图进行现场放样,在内支撑梁结构上划线,确定切割位置;
(4)安装固定绳锯机和操作台:根据放样的切割位置,选择绳锯机安装位置,将绳锯机安装在内支撑梁顶,选择便于观察、操控的位置放置绳锯操作台;
(5)内支撑梁切割:检查、调试绳锯机和安全防护装置,接通电源、冷却管,锁紧导向轮连杆准备开始切割,启动绳锯张紧电动机,通过控制台调整主动轮提升张力,保证金刚石绳适当绷紧,启动循环冷却水,启动回转切割电机,驱动主动轮带动金钢石绳索开始切割;
(6)混凝土块吊装:切割完成的混凝土块平放在先搭设的操作平台上,用叉车将混凝土块体水平移位至塔吊、吊车起重范围,或者直接由塔吊、吊车吊运至平板车上外运;
(7)混凝土块吊离后拆除操作平台;
(8)使用风镐对切割后的混凝土块进行破碎处理。
进一步的,所述步骤(2)中,搭设顺序为纵向扫地杆-立杆-横向扫地杆-纵向水平杆-横向水平杆-防护栏杆。
更进一步的,当操作平台的高度大于4m的时候,需要在搭设防护栏杆之前搭设若干道剪刀撑,所述剪刀撑设于防护栏杆架体的两侧,且固定在最下一层的横向扫地杆、纵向扫地杆和最上一层的纵向水平杆、横向水平杆上。
更进一步的,每道的所述剪刀撑的宽度为4-6m,其与地面的倾角为45°-60°。
进一步的,所述步骤(4)中,在内支撑梁的混凝土梁上方钻孔,并用膨胀螺栓紧锢绳锯机设备底座,通过调整绳锯切削角度,使金刚石绳口方向以及转动切割驱动轮、导向轮、切割绳、切割面在一个平面上。
进一步的,所述步骤(4)中,绳锯操作台放置在距离绳锯机侧后方5~10m处。
进一步的,所述步骤(5)中,内支撑梁切割应遵循先拆次梁,后拆主梁,最后拆除钢管立柱的顺序。
进一步的,所述步骤(5)中,采用竖向切割或水平切割方式进行施工。
更进一步的,水平切割时,水平孔口的冷却水加入点随锯缝移动;垂直切割时,冷却水喷嘴必须随着绳锯切割位置的改变而移动。
更进一步的,在水平面切割过程中,及时向已经完成切割的锯缝中加入支承楔块,防止混凝土块坠落压住串珠绳造成串珠绳损坏;在水平面切割过程中,根据需要在垂直锯缝中插入楔块,以支承分离体。
进一步的,所述步骤(5)中,切割过程中通过操作控制台调整 切割参数,保持金刚石绳运转线速度在20m/s左右。
进一步的,所述步骤(6)中,若混凝土块超过叉车工作高度,用电动葫芦将混凝土块转移至叉车上外运。
进一步的,所述步骤(6)中,在叉车转运混凝土或安设临时施工设备过程中,在已浇混凝土结构上方的叉车行车范围内铺放10mm厚的钢板保护。
根据上述结构的本发明,其有益效果在于,本发明采用无损静力切割,对结构扰动小,低噪音,无粉尘,无污染;切割速度快、效率高,例如切割一个截面积为1m2、体积为1m3混凝土结构,使用绳锯切除仅需要20分钟,工效较有了大幅度的提高;本发明整体设备简单、易于安装,不受场地与空间的限制,所切割的截面分块平整,可根据吊运设备吊重和场地条件来确定切割块的大小和方向;每台设备配置2人,减少人工配合空压机、风镐进行凿除,机械化程度高,减少劳动力的浪费。
附图说明
图1为本发明拆除结构剖面图;
图2为本发明内支撑梁的平面结构示意图;
图3为本发明切割线的分布示意图;
图4为本发明竖向切割线的示意图;
图5为本发明横向切割线的示意图;
图6为本发明绳锯机的安装位置示意图;
图7为本发明剪刀撑的分布结构示意图。
在图中,10、内支撑架;11、主梁;12、次梁;13、钢管立柱;20、已浇混凝土结构;30、结构模板支撑架;40、操作平台;41、纵向扫地杆;42、横向扫地杆;43、立杆;44、纵向水平杆;45、横向水平杆;50、绳锯机;61、竖向切割线;62、水平切割线;70、剪刀撑。
具体实施方式
下面结合附图以及实施方式对本发明进行进一步的描述:
如图1-6所示,一种内支撑绳锯无损切割拆除结构,包括操作平台40、内支撑架10以及绳锯机50,内支撑架10包括主梁11、次梁12以及钢管立柱13,主梁11和次梁12分别与钢管立柱13交叉连接。
操作平台40设于已浇混凝土结构20上,已浇混凝土结构20下方设有结构模板支撑架30,绳锯机50设于内支撑架10的梁顶,操作平台40包括纵向扫地杆41、立杆43、横向扫地杆42、纵向水平杆44、横向水平杆45以及防护栏杆(未示出),立杆43与纵向扫地杆41和横向扫地杆42交叉连接,立杆43还与纵向水平杆44和横向水平杆45交叉连接。其中,纵向水平杆44的间距为1m,其步距为1.5m,横向水平杆45间距为1m,其步距为1.5m。
若操作平台40的高度大于4m,需设置剪刀撑70。剪刀撑70设于防护栏杆架体的两侧,且固定在最下一层的横向扫地杆42、纵向扫地杆41和最上一层的纵向水平杆44、横向水平杆45上,每道的剪刀撑70的宽度为4-6m,其与地面的倾角为45°-60°。
优选的,绳锯机50的设备底座经膨胀螺丝固定在内支撑架10上 混凝土梁的钻孔内,并且绳锯机50上的金刚石绳口方向以及转动切割驱动轮、导向轮、切割绳、切割面在一个平面上。另外,绳锯机50侧后方设有绳锯操作台,且绳锯操作台距绳锯机50有5-10m。
另外,本发明还提供一种内支撑绳锯无损切割拆除结构的施工工法,包括以下步骤:
(1)施工准备;
(2)在内支撑梁底搭设操作平台;
(3)确定切割断面;
(4)安装固定绳锯机和操作台;
(5)内支撑梁切割;
(6)混凝土块吊装;
(7)使用风镐对切割后的混凝土块进行破碎处理。
各个步骤的具体操作为:
1、施工准备。
(1)将380V、220V交流电源以及充足的水源敷设到施工现场并连接主机连接好。
(2)切割施工前,确定基坑控制线、变形观测点等,并在设置后加以妥善保护。
2、搭设操作平台。
内支撑架10拆除前在混凝土梁底搭设操作平台40,操作平台40搭设于已浇混凝土结构20上方,已浇混凝土结构30设在结构模板支撑架30上。搭设顺序:纵向扫地杆41→立杆43→横向扫地杆42→ 纵向水平杆44→横向水平杆45→防护栏杆(图中未示出)。其中纵向扫地杆41和纵向水平杆44顺着内支撑梁10的方向,横向扫地杆42和纵向水平杆45垂直于内支撑梁10。
当操作平台的高度大于4m的时候,需要在搭设防护栏杆之前搭设若干道剪刀撑70,剪刀撑70设于防护栏杆架体的两侧,且固定在最下一层的横向扫地杆42、纵向扫地杆41和最上一层的纵向水平杆44、横向水平杆45上,每道剪刀撑70的宽度为4-6m,其与地面的倾角为45°-60°。
3、确定切割断面。
(1)内支撑拆除应遵循先拆次梁12,后拆主梁11,最后拆除钢管立柱13的顺序。
(2)施工前应绘制切割断面设计排版图,充分考虑吊装设备的起重能力,根据混凝土结构的截面计算切割块的大小、重量,确定每道切割断面位置,采用竖向切割或水平切割方式进行施工,得到切割线分为竖向切割线61和水平切割线62.
(3)施工人员根据切割断面设计排版图进行现场放样,在内支撑结构上划线,确定切割位置。
4、安装固定绳锯机50。
(1)根据放样的切割位置,选择合理的绳锯机50安装位置,将绳锯机50安装在梁顶。
(2)固定机位时,在混凝土梁上钻孔用膨胀螺栓紧锢绳锯机50设备底座。
(3)安放操作台40,在距离绳锯机50侧后方5~10m便于观察、操控的合适位置放置绳锯操作台40。
(4)调整绳锯切削角度,检查调查金刚石绳口方向以及转动切割驱动轮、导向轮、切割绳、切割面在一个平面上。
(5)接通电源、冷却管,锁紧导向轮连杆准备开始切割。
5、混凝土块切割。
(1)准备开启之前检查、调试好绳锯机50和安全防护装置。
(2)启动绳锯张紧电动机,通过控制台调整主动轮提升张力,保证金刚石绳适当绷紧。
(3)启动循环冷却水。
(4)启动回转切割电机,驱动主动轮带动金钢石绳索开始切割,内支撑梁切割应遵循先拆次梁,后拆主梁,最后拆除钢管立柱的顺序。
(5)切割过程中必须观察机座的稳定性,随时调整导向轮的偏移,以确保切割绳在同一个平面内。
(6)水平切割时,水平孔口的冷却水加入点随锯缝移动;垂直切割时,冷却水喷嘴必须随着绳锯切割位置的改变而移动。
(7)切割过程中通过操作控制台调整切割参数,保持金刚石绳运转线速度在20m/s左右。
(8)绳锯机50在进行锯切作业时,如出现故障,操作台上的故障指示灯亮,判断故障后及时排除。
(9)在水平面切割过程中,应及时向已经完成切割的锯缝中加入支承楔块,防止混凝土块坠落压住串珠绳造成串珠绳损坏,必要时 也可以在垂直锯缝中插入楔块,支承分离体。
6、混凝土块吊装。
(1)切割完成的混凝土块平放在先搭设的支承台上,可用叉车将混凝土块体水平移位至塔吊或吊车起重范围或直接由塔吊或吊车吊运至平板车上外运。
(2)超过叉车工作高度时,可用电动葫芦将混凝土块转移至叉车上外运。
(3)在叉车转运混凝土或安设临时施工设备过程中,在已浇混凝土结构上方的叉车行车范围内铺放10mm厚的钢板保护,避免破坏已浇混凝土结构。
7、使用风镐对切割后的混凝土块进行破碎处理。
本发明的工作原理为:液压金刚石绳锯切割设备由电动机、传动定位滑轮及带有金刚石绳索组合而成。金刚石绳索在电机带动下绕切割面高速旋转进行切割,同时用水冷却并带走粉削,被切割体在平稳的情况下被静态分离。
应用实例1
水贝珠宝总部大厦工程项目地块总用地面积21428.82㎡,总建筑面积246532.77㎡,容积率7.6,由2栋超高层、商业研发裙房、公交站及地下室(5层含设备房)组成。地下室为车库,±0.00以下162860㎡,共4层,±0.00以上16400㎡,由A座48层综合楼、B座35层(SOHO楼)和裙房5-8层组成。
本工程内支撑共三层,共混凝土7500m3;内撑梁1200×1200 1200×1000、1000×1000、800×1000、800×800、600×600等;南北对撑、西南角撑、东南角撑有板厚150mm;立柱采用
Figure PCTCN2016072282-appb-000001
钢管。
应用实例2
希顿国际广场位于成都市高新区双土村1、3组,开工时间2009年12月,竣工时间2015年7月。工程由37层五星级希尔顿酒店、39层甲级办公楼、42层高档次公寓式办公和四层地下室组成。总建筑面积238465.78㎡,其中地下53005.83㎡(含人防7034㎡),地上185459.95㎡。建筑高度168m。地下室主要功能为车库,设备用房以及其它功能用房等;裙房主要功能为办公会议,餐饮,物业,员工食堂等;塔楼用于酒店、办公及公寓。
因靠天府大道一侧为地铁1号线,基坑支护设计采用排桩+钢筋混凝土内支撑形式。竖向设2道支撑钢筋混凝土,混凝土强度C30,浇筑量约1000m3,主要构件截面尺寸800×800、600×600,立柱为钢格构柱。
应用实例3
基金大厦工程为超高层商业总部办公楼,地上42层,地下4层,裙房5层;建筑面积约109726.59㎡,其中地上81884.35㎡,地下27842.24㎡,建筑高度199.8m。
本工程内支撑共三层,标高分别为-13.000m、-7.900m、-1.400m,第二道、第三道内支撑标高位置在支护桩内侧设置了1m1.2m腰梁支撑。内支撑混凝土体量大(总混凝土约2700m3)、强度高(支撑梁砼强度C30)、钢筋量大、格构柱量大(97t)。基坑东西两侧对称支护, 七根对撑梁东西对称支护,对撑梁两端设八字撑,对撑梁之间用连杆和联系梁连接,对撑梁尺寸1000×1000,八字撑和联系梁尺寸1000×800,连杆尺寸800×600。支撑梁立柱采用钢格构柱(4L200×18组合),北侧第三道支撑梁底部局部采用2条φ700钢管柱立柱支撑。
应当理解的是,对本领域普通技术人员来说,可以根据上述说明加以改进或变换,而所有这些改进和变换都应属于本发明所附权利要求的保护范围。
上面结合附图对本发明专利进行了示例性的描述,显然本发明专利的实现并不受上述方式的限制,只要采用了本发明专利的方法构思和技术方案进行的各种改进,或未经改进将本发明专利的构思和技术方案直接应用于其它场合的,均在本发明的保护范围内。

Claims (10)

  1. 一种内支撑绳锯无损切割拆除结构,其特征在于,包括操作平台、内支撑架以及绳锯机,所述操作平台设于已浇混凝土结构上,所述已浇混凝土结构下方设有结构模板支撑架,所述绳锯机设于所述内支撑架的梁顶,所述操作平台包括纵向扫地杆、立杆、横向扫地杆、纵向水平杆、横向水平杆以及防护栏杆,所述立杆与所述纵向扫地杆和所述横向扫地杆交叉连接,所述立杆还与所述纵向水平杆和所述横向水平杆交叉连接。
  2. 根据权利要求1所述的内支撑绳锯无损切割拆除结构,其特征在于,所述操作平台还包括剪刀撑,所述剪刀撑设于防护栏杆架体的两侧,且固定在最下一层的横向扫地杆、纵向扫地杆和最上一层的纵向水平杆、横向水平杆上。
  3. 根据权利要求2所述的内支撑绳锯无损切割拆除结构,其特征在于,每道的所述剪刀撑的宽度为4-6m,其与地面的倾角为45°-60°。
  4. 如权利要求1-3任一项所述的内支撑绳锯无损切割拆除结构的施工工法,其特征在于,包括以下步骤:
    (1)施工准备:将380V、220V交流电源以及充足的水源敷设到施工现场并与主机连接好,确定基坑控制线、变形观测点并在设置后加以妥善保护;
    (2)在内支撑梁底搭设操作平台:操作平台搭设于已浇混凝土结构上方,已浇混凝土结构设在结构模板支撑架上;
    (3)确定切割断面:根据吊装设备的起重能力和内支撑梁混凝土结构的截面计算切割块的大小、重量,确定每道切割断面位置,绘制切割断面设计排版图,施工人员根据切割断面设计排版图进行现场放样,在内支撑梁结构上划线,确定切割位置;
    (4)安装固定绳锯机和操作台:根据放样的切割位置,选择绳锯机安装位置,将绳锯机安装在内支撑梁顶,选择便于观察操控的位置放置绳锯操作台;
    (5)内支撑梁切割:检查、调试绳锯机和安全防护装置,接通电源、冷却管,锁紧导向轮连杆准备开始切割,启动绳锯张紧电动机,通过控制台调整主动轮提升张力,保证金刚石绳适当绷紧,启动循环冷却水,启动回转切割电机,驱动主动轮带动金钢石绳索开始切割;
    (6)混凝土块吊装:切割完成的混凝土块平放在先搭设的操作平台上,用叉车将混凝土块体水平移位至塔吊、吊车起重范围,或者直接由塔吊、吊车吊运至平板车上外运;
    (7)混凝土块吊离后拆除操作平台;
    (8)使用风镐对切割后的混凝土块进行破碎处理。
  5. 根据权利要求1所述的内支撑绳锯无损切割拆除结构的施工工法,其特征在于,若操作平台的高度大于4m,在搭设防护栏杆之前搭设若干道剪刀撑,所述剪刀撑设于防护栏杆架体的两侧,且固定在最下一层的横向扫地杆、纵向扫地杆和最上一层的纵向水平杆、横向水平杆上。
  6. 根据权利要求1所述的内支撑绳锯无损切割拆除结构的施工 工法,其特征在于,所述步骤(5)中,采用竖向切割或水平切割方式进行施工。
  7. 根据权利要求6所述的内支撑绳锯无损切割拆除结构的施工工法,其特征在于,水平切割时,水平孔口的冷却水加入点随锯缝移动;垂直切割时,冷却水喷嘴必须随着绳锯切割位置的改变而移动。
  8. 根据权利要求6所述的内支撑绳锯无损切割拆除结构的施工工法,其特征在于,在水平面切割过程中,及时向已经完成切割的锯缝中加入支承楔块,防止混凝土块坠落压住串珠绳造成串珠绳损坏;在水平面切割过程中,根据需要在垂直锯缝中插入楔块,以支承分离体。
  9. 根据权利要求1所述的内支撑绳锯无损切割拆除结构的施工工法,其特征在于,所述步骤(6)中,若混凝土块超过叉车工作高度,用电动葫芦将混凝土块转移至叉车上外运。
  10. 根据权利要求1所述的内支撑绳锯无损切割拆除结构的施工工法,其特征在于,所述步骤(6)中,在叉车转运混凝土或安设临时施工设备过程中,在已浇混凝土结构上方的叉车行车范围内铺放10mm厚的钢板保护。
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CN116427430A (zh) * 2023-05-30 2023-07-14 广州市机电安装有限公司 一种内支撑回顶拆除施工工法

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